1HX Signature Model- based on Steve's exceptional early 1970s 1X screw rim mouthpiece, B style cup, #24 throat and H24 backbore. 

 This model was developed over eighteen-month by Steve Haefner (Tulsa Symphony Orchestra) and Gary Radtke (GR Technologies).

Rim-The same feel as Steve’s early 1970’s 1X screw rim.  The rim is fairly flat with somewhat sharp bite and most players find it comfortable with good endurance.  Not recommended for players that like a rounded rim.

Cup-This was redesigned and the discontinuities were removed by GR to provide a more even blow and improved intonation.

Backbore- GR redesigned and improved the 24 to meet Steve’s demands.  The discontinuities were removed providing an improved scale, attacks, and tone quality.  Also available with the GR#3 backbore.

Blank-Slightly heavier than other manufactures mouthpieces at the traditional length providing a beautiful huge sound that is stable at all volume levels.       

Design Improvements: the Signature Model has a noticeably bigger sound than Steve's original Screw Rim Bach Mouthpiece (which is an exceptional 'factory' mouthpiece), outstanding projection, more energy than the original mouthpiece.  Performs much better and evenly from low to high, and is easier in the upper register than the original.  Intonation is also significantly improved with the Haefner 1HX Mouthpiece.

Quality: The workmanship and consistency on the GR / Haefner Mouthpieces is superior in every way. Unlike other mouthpieces, they ALL play fantastic.  Each mouthpiece is identified with a Serial Number.

The 1HX is offered in seven different custom models.  The rim and upper cup feel are the same as the 1HX Signature; the only differences are very slight program modifications to the throat entrance and Beta angle (see GR web site mouthpiece drawing).  These modifications affect the resistance and timbre of the mouthpiece to provide slightly more, or slightly less resistance to suit an individual player's preference, as well as to facilitate adaptation to a different trumpet such as a rotary.  For more information on these custom models please contact us email

All three trumpet players in the Tulsa Philharmonic play the Haefner 1HX Signature Model, and four of the trumpet players on the Tulsa Philharmonic sub list are playing Haefner 1HX mouthpieces as well.

3HX Signature Model - Similar to the 1HX but in the .66 (3 diameter) with the same powerful symphonic sound and efficiency, B style cup, #24 throat and choice of #3 or H24 backbore. 

Rim - The same feel as Steve’s early 1970’s 1X screw rim downsized the profile to .66.  The rim is fairly flat with somewhat sharp bite and most players find it comfortable with good endurance.  Not recommended for players that like a rounded rim.

Cup - This was redesigned to provide a more even blow and improved intonation. B Style Cup.

Backbore - GR redesigned and improved the 24 backbore to meet Steve’s demands.  This provides an improved scale, attacks, and tone quality.  Also available with the GR#3 backbore.

Blank - Slightly heavier than other manufactures mouthpieces at the traditional length providing a beautiful huge sound that is stable at all volume levels.       

Design Improvements: the Signature Model - Same as the 1HX.  Each mouthpiece is identified with a Serial Number.

The 3HX has a very powerful and compact symphonic sound with great projection. 

GR Haefner Series Post Horn Mouthpieces

The 1HXPH or Post Horn mouthpiece is designed to give you a softer lyrical quality to your playing.

The 1HXPH design has a shorter overall length, a larger throat bore, more open throat entrance, unique new backbore, and new shank design.

The 1HXPH is the same as the 3FD but with a trumpet size .385" shank to gap properly on trumpet. This mouthpiece may work on some flugels but it is a great mouthpiece to play post horn pieces like the solo from Mahler 3 or Schumann 2.

Used with a matching flugelhorn the 1HXPH provides a beautiful sound, accuracy of articulation, exceptional intonation, and even slotting throughout the range of the instrument.

Caution - The shank may bottom out on certain trumpets; therefore, the gap should be inspected to insure the mouthpiece doesn’t bottom out on the receiver.

Using the 1HXPH mouthpiece on the trumpet will require the tuning slide to be pulled out.

GR Haefner Series Trumpet Mouthpieces

GR Haefner Series Cornet Mouthpieces

GR Haefner Series Piccolo Trumpet Mouthpieces

GR Haefner Series Flugelhorn Mouthpiece

Steve Haefner Mouthpieces are only available through Steve, and his selected dealers.

TrumpetPro - An Official Haefner Mouthpiece Dealer